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Coding Help
This is a counterpart to the "Mapping Help" thread. If you need help with QuakeC coding, or questions about how to do some engine modification, this is the place for you! We've got a few coders here on the forum and hopefully someone knows the answer.
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Right, Uhm Wrong 
missile.origin = self.origin + v_forward * 8 + v_right * -16 + '0 0 24';
returns a launcher that shoots from the launching point left above the player.

missile.origin = self.origin + v_forward * 8 + v_right * -16 + v_up * 16;
returns a missile that explodes left of the player.

I'm thinking I'm changing the end point of the missile hitting the player. It launches from the right point, but it ends up blind. Also the negative parm comes out strange. It's not left handed? 
Try 
In TermHome,
dir = normalize(vtemp - self.origin);

Maybe. 
Well 
I used the enforcer_laser methode to launch the missile.
This way it is the simpelest way to compile for the wanted use.
The code was from the Orb, and I had a hard job on coding the weapon.

Thanks for the hints!
They were helpfull. 
@metlslime 
Rubicon 2 question:

You have IT_NO_WEAPON replacing IT_EXTRA_WEAPON in the code. However, I'm not sure how to implement this in a map. Not seeing a spawnflag or other way to enable it. 
Trace Volume? 
Is there a way to trace a volume similar to traceline? I need to find a volume that is not occupied by players or monsters of any size. maybe something like traceline? 
@Shanjaq 
any decent engine will have a tracebox builtin for things like that.

failing that, you can also exploit quirks of droptofloor or walkmove(typically with FL_FLY?), but these are much more limited and may have additional engine-specific quirks that break your mod (at least in DP). 
Tracebox 
Something I wrote before on how you might write a tracebox function using the method Spike suggests. His caveats stand

http://www.celephais.net/board/view_thread.php?id=60097&start=245&end=246 
Dumptruck: 
Spawning with no weapons works but was never used in any of the maps so I didn't finish the part where an info player start can opt in to it. Right now it's just hard coded so to only happen if mapmame == test.bsp

So you would have to make some quakec change to complete the feature, or just change the hard coded string it's looking for -- or name your map test.bsp :) 
 
Is there any way to attach colored lights to projectiles or explosions via QC?

I would like to make the vore's ball glow with a purple light, make the tarbaby's explosion blue, this sort of thing...

I'm using quakespasm-spiked btw. 
Qss 
a trail particle effect with 'lightrgb' and 'lightradius' set should be able to provide coloured dynamic lights, but it might only be with flashblends. I don't think I actually got around to testing it properly.

point effects will additionally need lighttime, and probably want at least one of lightrgbfade+lightradiusfade.

there are additional light properties, but those are specific to rtlights, which are definitely not supported in qss. 
@Spike 
Thanks! I'll try that =D 
 
What's the most reliable way to detect if the player is on a slippery slope (mostly vertical angle)? I'm using QuakeSpasm-Spiked. 
Slippery Slope 
tracebox(self.origin, self.mins, self.maxs, self.origin-'0 0 1', TRUE, self);
if (trace_fraction < 1 && trace_plane_normal_z < 0.7)
surfaceangleissteeperthanabout45degrees();

you could instead use traceline, but it would not match the player's physics so well. 
 
Thanks, but the most difficult thing about it is detecting the exact moment when the player touches/lands on the slope. AFAIK the engine doesn't set FL_ONGROUND for it, and assigning .touch functions to players doesn't work properly. 
 
Is there a way to achieve something similar to DP's (and Makaqu's) .glow_size in QSS, through QC?

More specifically, negative dynamic lighting with custom radius and intensity, tied to an entity.

I've seen some ways to customize lighting effects in qsextensions.qc, but there's no way to change their properties and make them move around dynamically.

Also, I would like such negative lights to affect only BSP models, without affecting MDL, SPR and particles. 
Out Of The Blue 
moving lights hack, maybe? 
Can't Jump When On Top Of Monsters/explo Boxes 
There was some QuakeC fix posted here, but I can't find it. Can someone repost the fix? 
@Six-Shoota 
C0burn 
10x 
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